Despite reading all the google results, yt tutorials and Pycharm's documentation, I have no idea how to solve the problem that:

instead of debugging I have
"Frames are not available"
and the only thing I found is to add: PYDEVD_USE_CYTHON = NO and PYDEVD_USE_FRAME_EVAL = NO to environment variables, but "Unresolved reference NO". (I tried False too).
What should try to do/find/learn?